Arrange the following events in chronological order:

A- Establishment of The Department of Defence Production in India
B- India conducted its first Nuclear explosion
C- Establishment of the Department of Defence Supplies in India
D- China became a Nuclear power state

A, D, C, B

Correct chronology of given events:

A- Establishment of The Department of Defence Production in India - 1962

D- China became a Nuclear power state - 1964 (It became a P5 member in 1965).

C- Establishment of the Department of Defence Supplies in India - 1965

B- India conducted its first Nuclear explosion - 1974 (Smiling Buddha, India's first Nuclear test was conducted in Pokhran)